CN2126749Y

CN2126749Y - Safety earthing device

Info

Publication number: CN2126749Y
Application number: CN 91229848
Authority: CN
Inventors: 杨树
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-12-06
Filing date: 1991-12-06
Publication date: 1993-02-03
Anticipated expiration: 2001-12-06

Abstract

The utility model relates to an electric maize threshing machine, which belongs to a maize threshing device. The utility model is characterized in that a motor drives the rotation of a main shaft; the main shaft has an iron pole; threshing is carried out in an iron cylinder. The utility model has the advantages of simple structure, light performance, high production efficiency, saving time, saving electricity, and low cost. The electric maize threshing machine is suitable for processing in wide households, collectives, and individuals in countryside.

Description

Safety earthing device

The utility model relates to a kind of protective earth, and it is used for the security tool of high-voltage fence service work.

At present, high pressure electric industry service work personnel, after cutting off the electricity supply, or broken string ground connection, tree bar connect etc. after phenomenon takes place, for the sake of security, still need whether really to cut off the power supply with a high voltage testing testing circuit earlier, and then earth connection is hung on the high voltage electric equipment housing, just can carry out electric maintenance.But often the maintainer relies on the experience of repeatedly practice or leaves behind electroscope, and directly earth connection is suspended on the high voltage electric equipment housing, does not meet the carelessness of safety operation, brings human casualty accident sometimes.

The purpose of this utility model will provide a kind of safety ground device, and it is whether can measure measured object charged, and can be as the earth connection that connects the earth.

The purpose of this utility model is achieved in that the upper end of the empty tube of insulation is connected with the metal hanger lower end, in the empty tube inner chamber central protrusion of insulation chamber, connect and connect the earth connection stage casing on loudspeaker and the lower part wall, and the neon tube on the circuit board, light-emitting diode and battery are connected electrically on the circuit board mutually, loudspeaker also are connected electrically on the circuit board, and circuit board is electrically connected with the metal hanger lower end again.When measured object was charged, neon tube starter, light-emitting diode glowed and loudspeaker are sounded; When measured object was not charged, tucket stopped, and neon tube and light-emitting diode be no power all, then the wiring ring end of earth connection was connected electrically on the metal hanger, and the shank end is imbedded underground.

Because whether adopt such scheme, it is charged both to have played test, also play the earth connection effect simultaneously, guaranteed high-tension electricity service work personnel's personal safety, and structure is simple.

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the schematic diagram of an embodiment of the utility model.

Among the figure: 1. metal hanger, the 2. empty tube of insulation, 3. earth connection, 1a. strap, 1b. ambulatory splint, 2a. circuit board, 2b. loudspeaker, 3a. wiring ring, 3b. shank, 3c. housing screw.

In the embodiment shown in fig. 1, the metallic conduction plate that metal hanger 1 has the strap 1a that can clamp up and down and ambulatory splint 1b constitutes, can relatively move to be threaded at strap 1a and ambulatory splint 1b, and be connected with ambulatory splint 1b lower end thread segment on the inner chamber of the empty tube 2 of insulation.The empty tube 2 of insulation is to be formed by plastic pouring, its inner chamber top be screwed connect a circuit board 2a, on circuit board 2a fixedly neon tube, light-emitting diode and dry cell, and they reciprocally are connected on the circuit board 2a; And inner chamber central protrusion cylinder internal fixation one loudspeaker 2b, and also be electrically connected with circuit board 2a, circuit board 2a upper end is electrically connected with ambulatory splint 1b lower end.In the screw, screw in the housing screw 3c of band transverse groove on the empty tube of insulation 2 lower sides, earth connection 3 passes the transverse groove of housing screw 3c, and is fixed on the empty tube 2 of insulation.When measured object was not charged, the wiring ring 3a of earth connection 3 end, be connected on the strap 1a right side lug of metal hanger 1 with screw, and that the shank 3b of earth connection 3 end is directly imbedded was underground, and promptly earth connection 3 is electrically connected with the earth.

Operating process is as follows:

In 15～20 centimeters scopes of the high-tension line that enters the examination and repair for high-pressure electric equipment, owing to responded to by high voltage electric field, loudspeaker 2b in the empty tube 2 of insulation sends sound, the safety ground device of the empty tube part of handheld insulation then, metal hanger 1 is clamped on the housing of certain high voltage electric equipment or on certain high-tension line, if measured object is charged, measured object has high voltage relative to the earth, circuit board 2a goes up the neon tube starter, light-emitting diode glows, and loudspeaker 2b sounding increases simultaneously.If measured object is not charged, loudspeaker 2b sounding stops, neon tube starter not, light-emitting diode is not luminous yet, this moment, power supply was cut off, or broken string ground connection or porcelain screen breaks, or the tree bar connects etc., so, the shank 3b end that is fixed on the earth connection 3 on the empty tube 2 of insulation is imbedded underground, wiring ring 3a end is connected the strap 1a right flank of metal hanger 1.

Claims

A kind of safety ground device comprises metal hanger, the empty tube of insulation, circuit board and earth connection, it is characterized in that: the upper end of the empty tube of insulation is connected with the metal hanger lower end, in the empty tube inner chamber central protrusion of insulation chamber, connect and connect the earth connection stage casing on loudspeaker and the lower part wall, and the neon tube on the circuit board, light-emitting diode and battery are connected electrically on the circuit board mutually, loudspeaker also are connected electrically on the circuit board, and circuit board is electrically connected with the metal hanger lower end again.